The Honeynet Project & Research Alliance are excited to announce the release of a new paper in our Know Your Enemy series, ?KYE: Malicious Web Servers?. In this paper, we take an in-depth look at malicious web servers that attack web browsers, and we evaluate several defensive strategies that can be employed to counter this threat of client-side attacks. All the malicious web servers identified in this study were found with our client honeypot Capture-HPC, which we make freely available from our web site at http://www.nz-honeynet.org/capture.html.